Season 6: Episode 18: The Contractual Obligation Implementation

Sheldon, Wolowitz, and Leonard are forced to volunteer on a committee for the university, but Sheldon hates nearly all of them and doesn't want to put forth any extra effort. Koothrappali has been texting Lucy nonstop, since texting makes him less nervous and he comes off as more charming. Meanwhile, Penny, Amy, and Bernadette play hooky from work to get princess makeovers at Disneyland.